Micrologic control units 2.0 E X Y Z. Overview of functions. Functions and characteristics

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1 Overview of functions All Masterpact circuit breakers are equipped with a Micrologic control unit that can be changed on site. Control units are designed to protect Power circuits and loads. Alarms may be programmed for remote indications. Measurements of current, voltage, frequency, power and power quality optimise continuity of service and energy management. Dependability Integration of protection functions in an ASIC electronic component used in all guarantees a high degree of reliability and immunity to conducted or radiated disturbances. On Micrologic A, E, P and H control units, advanced functions are managed by an independent microprocessor. Accessories Certain functions require the addition of Micrologic control unit accessories, described on page A-28. The rules governing the various possible combinations can be found in the documentation accessible via the Products and services menu of the web site. Micrologic name codes 2.0 E X Y Z DB eps Current protection Micrologic 2: basic protection Protection: + instantaneous X: type of protection b 2 for basic protection b 5 for selective protection b 6 for selective + earth-fault protection b 7 for selective + earth-leakage protection. Y: control-unit generation Micrologic 5: selective protection Z: type of measurement b A for ammeter b E for energy b P for power meter b H for harmonic meter. DB eps Protection: + short time + instantaneous DB eps PB eps DB eps PB106351A32.eps Protection: + short time + instantaneous + earth fault DB eps DB eps Protection: + short time + instantaneous + earth leakage up to 3200A A-8

2 menu instantaneous menu short time alarm alarm menu instantaneous menu short time menu short time ground fault alarm alarm alarm Measurements and programmable protection A: ammeter b I 1, I 2, I 3, I N, I earth-fault, I earth-leakage and maximeter for these measurements b fault indications b settings in amperes and in seconds. E: Energy P: A + power meter + programmable protection b incorporates all the rms measurements of Micrologic A, plus voltage, power factor, power and energy metering measurements b calculates the current demand value b "Quickview" function for the automatic cyclical display of the most useful values (as standard or by selection). b measurements of V, A, W, VAR, VA, Wh, VARh, VAh, Hz, V peak, A peak, power factor and maximeters and minimeters b IDMTL long-time protection, minimum and maximum voltage and frequency, voltage and current imbalance, phase sequence, reverse power b load shedding and reconnection depending on power or current b measurements of interrupted currents, differentiated fault indications, maintenance indications, event histories and time-stamping, etc. H: P + harmonics b power quality: fundamentals, distortion, amplitude and phase of harmonics up to the 31st order b waveform capture after fault, alarm or on request b enhanced alarm programming: thresholds and actions. 2.0 A DB eps Micrologic 2.0 A 2.0 E DB eps Micrologic 2.0 E 100% 100% 40% 40% 5.0 A Micrologic DB eps 5.0 A 5.0 E Micrologic DB eps 5.0 E 5.0 P DB eps 5.0 H DB eps 100% 100% 40% 40% DB eps DB eps Micrologic 6.0 E DB eps DB eps 100% 40% DB eps DB eps DB eps A-9

3 Micrologic A ammeter DB eps Micrologic A control units protect power circuits. They also offer measurements, display, communication and current maximeters. Version 6 provides earth-fault protection, version 7 provides earth-leakage protection. 1 long-time threshold and tripping delay 2 overload alarm (LED) at 1,125 Ir 3 short-time pick-up and tripping delay 4 instantaneous pick-up 5 earth-leakage or earth-fault pick-up and tripping delay 6 earth-leakage or earth-fault test button 7 long-time rating plug screw 8 test connector 9 lamp test, reset and battery test 10 indication of tripping cause 11 digital display 12 three-phase bargraph and ammeter 13 navigation buttons "Ammeter" measurements Micrologic A control units measure the true (rms) value of currents. They provide continuous current measurements from 0.2 to 1.2 In and are accurate to within 1.5 % (including the sensors). A digital LCD screen continuously displays the most heavily loaded phase (Imax) or successively pressing the navigation button. The optional external power supply makes it possible to display currents < 20 % In. changes linearly from 4 % to 1.5 %. Communication option In conjunction with the COM communication option, the control unit transmits the following: b settings b all ammeter measurements b tripping causes b maximeter readings. Protection Protection thresholds and delays are set using the adjustment dials. Overload protection True rms long-time protection. Thermal memory: thermal image before and after tripping. Setting accuracy may be enhanced by limiting the setting range using a different long-time rating plug. Short-circuit protection Short-time (rms) and instantaneous protection. Selection of I 2 t type (ON or OFF) for short-time delay. Earth-fault protection Residual or source ground return earth fault protection. Selection of I 2 t type (ON or OFF) for delay. Residual earth-leakage protection (Vigi). Operation without an external power supply. q Protected against nuisance tripping. k DC-component withstand class A up to 10 A. Neutral protection On three-pole circuit breakers, neutral protection is not possible. On four-pole circuit breakers, neutral protection may be set using a three-position switch: neutral unprotected (4P 3d), neutral protection at 0.5 Ir (4P 3d + N/2), neutral protection at Ir (4P 4d). Zone selective interlocking (ZSI) A ZSI terminal block may be used to interconnect a number of control units to provide total discrimination for short-time and earth-fault protection, without a delay before tripping. Overload alarm A yellow alarm LED goes on when the current exceeds the long-time trip threshold. Fault indications LEDs indicate the type of fault: b overload (long-time protection Ir) b short-circuit (short-time Isd or instantaneous li protection) b b internal fault (Ap). Battery power The fault indication LEDs remain on until the test/reset button is pressed. Under normal operating conditions, the battery supplying the LEDs has a service life of approximately 10 years. Test A mini test kit or a portable test kit may be connected to the test connector on the front to check circuit breaker operation. For Micrologic 6.0 A and 7.0 A control units, the operation of earth-fault or earth-leakage protection can be checked by pressing the test button located above the test connector. Note: Micrologic A control units come with a transparent lead-seal cover as standard. A-10

4 Protection Micrologic 2.0 A Long time Current setting (A) Tripping between 1.05 and 1.20 x Ir Other ranges or disable by changing long-time rating plug Time setting tr (s) Time delay (s) Accuracy: 0 to -30 % 1.5 x Ir Accuracy: 0 to -20 % 6 x Ir 0.7 (1) Accuracy: 0 to -20 % 7.2 x Ir 0.7 (2) Thermal memory 20 minutes before and after tripping (1) 0 to -40 % - (2) 0 to -60 % Instantaneous ANSI Code 50 Pick-up (A) Isd Time delay Max resettable time: 20 ms Max break time: 80 ms Protection Long time Current setting (A) Ir Tripping between 1.05 and 1.20 x Ir Other ranges or disable by changing long-time rating plug Time setting tr (s) Time delay (s) Accuracy: 0 to -30 % 1.5 x Ir Accuracy: 0 to -20 % 6 x Ir 0.7 (1) Accuracy: 0 to -20 % 7.2 x Ir 0.7 (2) Thermal memory 20 minutes before and after tripping (1) 0 to -40 % - (2) 0 to -60 % Short time ANSI Code 51 Pick-up (A) Isd Time setting tsd (s) Settings I 2 t Off Time delay (ms) at 10 x Ir tsd (max resettable time) (I 2 t Off or I 2 t On) tsd (max break time) Instantaneous ANSI Code 50 Pick-up (A) Ii off Time delay Max resettable time: 20 ms Max break time: 50 ms Earth fault ANSI Code 51N Pick-up (A) Ig A B C D E F G H J In y 400 A A < In < 1250 A In u 1250 A Time setting tg (s) Settings I 2 t Off Time delay (ms) tg (max resettable time) at In or 1200 A (I 2 t Off or I 2 t On) tg (max break time) Residual earth leakage (Vigi) ANSI Code 51G Sensitivity (A) I n Accuracy: 0 to -20 % Time delay t (ms) Settings t (max resettable time) t (max break time) DB eps DB eps DB eps DB eps Ammeter Type of measurements Range Accuracy Instantaneous currents I1, I2, I3, IN 0.2 x In to 1.2 x In ±1.5 % Ig (6.0 A) 0.2 x In to In ±10 % I n (7.0 A) 0 to 30 A ±1.5 % Current maximeters of I1, I2, I3, IN 0.2 x In to 1.2 x In ±1.5 % Note: all current-based protection functions require no auxiliary source. The test / reset button resets maximeters, clears the tripping indication and tests the battery. A-11

5 Micrologic E energy DB eps Micrologic E control units protect power circuits. They also offer measurements, display, communication and current maximeters. Version 6 provides earth-fault protection long-time threshold and tripping delay 2 overload alarm (LED) at 1,125 Ir 3 short-time pick-up and tripping delay 4 instantaneous pick-up 5 earth-leakage or earth-fault pick-up and tripping delay 6 earth-leakage or earth-fault test button 7 long-time rating plug screw 8 test connector 9 lamp test, reset and battery test 10 indication of tripping cause 11 digital display 12 three-phase bargraph and ammeter 13 navigation button "quick View" (only with Micrologic E) 14 navigation button to view menu contents 15 navigation button to change menu (1) Display on FDM only. Note: Micrologic E control units come with a transparent lead-seal cover as standard. A-12 "Energy meter" measurements In addition to the ammeter measurements of Micrologic A Micrologic E control units measure and display: b current demand b voltages: phase to phase, phase to neutral, average (1) and unbalanced (1) b instantaneous power: P, Q, S b power factor: PF b power demand: P demand b energy: Ep, Eq (1), Es (1). Accuracy of active energy Ep is 2 % (including the sensors). The range of measurement is the same as current with Micrologic A, depending of an external power supply module (24 V DC). Communication option In conjunction with the COM communication option, the control unit transmits the following: b settings b all "ammeter" and "energy" measurements b enable connection to FDM b tripping causes b maximeter / minimeter readings. Protection Protection thresholds and delays are set using the adjustment dials. Overload protection True rms long-time protection. Thermal memory: thermal image before and after tripping. Setting accuracy may be enhanced by limiting the setting range using a different rating plug "Off". Short-circuit protection Short-time (rms) and instantaneous protection. Selection of I 2 t type (ON or OFF) for short-time delay. Earth-fault protection Source ground return earth fault protection. Selection of I 2 t type (ON or OFF) for delay. Neutral protection On three-pole circuit breakers, neutral protection is not possible. On four-pole circuit breakers, neutral protection may be set using a three-position switch: neutral unprotected (4P 3d), neutral protection at 0.5 Ir (4P 3d + N/2), neutral protection at Ir (4P 4d). Zone selective interlocking (ZSI) A ZSI terminal block may be used to interconnect a number of control units to provide total discrimination for short-time and earth-fault protection, without a delay before tripping. Overload alarm A yellow alarm LED goes on when the current exceeds the long-time trip threshold. M2C programmable contacts The M2C (two contacts) programmable contacts may be used to signal envents (Ir, Isd, Alarm Ir, Alarm Ig, Ig). They can be programmed using the keypad on the Micrologic E control unit or remotely using the COM option (BCM ULP). Fault indications LEDs indicate the type of fault: b overload (long-time protection Ir) b short-circuit (short-time Isd or instantaneous li protection) b earth fault (Ig) b internal fault (Ap). Trip history The trip history displays the list of the last 10 trips. For each trip, the following indications are recorded and displayed: b the tripping cause: Ir, Isd, li, Ig or Auto-protection (Ap) trips b the date and time of the trip (requires communication option). Battery power The fault indication LEDs remain on until the test/reset button is pressed. Under normal operating conditions, the battery supplying the LEDs has a service life of approximately 10 years. Test A mini test kit or a portable test kit may be connected to the test connector on the front to check circuit breaker operation. For Micrologic 6.0 E control units, the operation of earth-fault or earth-leakage protection can be checked by pressing the test button located above the test connector.

6 Protection Micrologic 2.0 E Long time Current setting (A) Tripping between 1.05 and 1.20 x Ir Other ranges or disable by changing long-time rating plug Time setting tr (s) Time delay (s) Accuracy: 0 to -30 % 1.5 x Ir Accuracy: 0 to -20 % 6 x Ir 0.7 (1) Accuracy: 0 to -20 % 7.2 x Ir 0.7 (2) Thermal memory 20 minutes before and after tripping (1) 0 to -40 % - (2) 0 to -60 % Instantaneous ANSI Code 50 Pick-up (A) Isd Time delay Max resettable time: 20 ms Max break time: 80 ms Protection Long time Current setting (A) Ir Tripping between 1.05 and 1.20 x Ir Other ranges or disable by changing long-time rating plug Time setting tr (s) Time delay (s) Accuracy: 0 to -30 % 1.5 x Ir Accuracy: 0 to -20 % 6 x Ir 0.7 (1) Accuracy: 0 to -20 % 7.2 x Ir 0.7 (2) Thermal memory 20 minutes before and after tripping (1) 0 to -40 % - (2) 0 to -60 % Short time ANSI Code 51 Pick-up (A) Isd Time setting tsd (s) Settings I 2 t Off Time delay (ms) at 10 x Ir tsd (max resettable time) (I 2 t Off or I 2 t On) tsd (max break time) Instantaneous ANSI Code 50 Pick-up (A) Ii off Time delay Max resettable time: 20 ms Max break time: 50 ms Earth fault ANSI Code 51N Pick-up (A) Ig A B C D E F G H J In y 400 A A < In < 1250 A In u 1250 A Time setting tg (s) Settings I 2 t Off Time delay (ms) tg (max resettable time) at In or 1200 A (I 2 t Off or I 2 t On) tg (max break time) Energy Type of measurements Range Accuracy Instantaneous currents I1, I2, I3, IN 0.2 x In to 1.2 x In ±1.5 % Ig (6.0 E) 0.05 x In to In ±10 % Current maximeters of I1, I2, I3, IN 0.2 x In to 1.2 x In ±1.5 % Demand currents of I1, I2, I3, Ig 0.2 x In to 1.2 x In ±1.5 % Voltages V12, V23, V31, V1N, V2N, V3N 100 to 690 V ±0.5 % Active power P 30 to 2000 kw ±2 % Power factor PF 0 to 1 ±2 % Demand power P demand 30 to 2000 kw ±2 % Active energy Ep GWh to GWh ±2 % Note: all current-based protection functions require no auxiliary source. The test / reset button resets maximeters, clears the tripping indication and tests the battery. DB eps DB eps DB eps A-13

7 Micrologic P power DB eps Micrologic P control units include all the functions offered by Micrologic A. In addition, they measure voltages and calculate power and energy values. They also offer new protection functions based on currents, voltages, frequency and power reinforce load protection in real time. 1 Long-time current setting and tripping delay. 2 Overload signal (LED). 3 Short-time pick-up and tripping delay. 4 Instantaneous pick-up. 5 Earth-leakage or earth-fault pick-up and tripping delay. 6 Earth-leakage or earth-fault test button. 7 Long-time rating plug screw. 8 Test connector. 9 Lamp + battery test and indications reset. 10 Indication of tripping cause. 11 High-resolution screen. 12 Measurement display. 13 Maintenance indicators. 14 Protection settings. 15 Navigation buttons. 16 Hole for settings lockout pin on cover. Protection... + Protection settings The adjustable protection functions are identical to those of Micrologic A (overloads, short-circuits, earth-fault and earth-leakage protection). Fine adjustment (to within one ampere) and time delays (to within one second) is possible on the keypad or remotely using the COM option (BCM ULP). Coordination with fuse-type or medium-voltage protection systems is optimised by adjusting the slope of the overload-protection curve. This setting also ensures better operation of this protection function with certain loads. Neutral protection On three-pole circuit breakers, neutral protection may be set using the keypad or remotely using the COM option (BCM ULP), to one of four positions: neutral unprotected (4P 3d), neutral protection at 0.5 Ir (4P 3d + N/2), neutral protection at Ir (4P 4d) and neutral protection at 1.6 Ir (4P 3d + 1.6N). Neutral protection at 1.6 Ir is used when the neutral conductor is twice the size of the phase conductors (major load imbalance, high level of third order harmonics). On four-pole circuit breakers, neutral protection may be set using a three-position switch or the keypad: neutral unprotected (4P 3d), neutral protection at 0.5 Ir (4P 3d + N/2), neutral protection at Ir (4P 4d). Neutral protection produces no effect if the long-time curve is set to one of the IDMTL protection settings. Programmable alarms and other protection Depending on the thresholds and time delays set using the keypad or remotely using the COM option (BCM ULP), the Micrologic P control unit monitors currents and voltage, power, frequency and the phase sequence. Each threshold overrun is signalled remotely via the COM option (BCM ULP). Each threshold overrun may be combined with tripping (protection) or an indication carried out by an optional M2C or M6C programmable contact (alarm), or both (protection and alarm). Load shedding and reconnection Load shedding and reconnection parameters may be set according to the power a supervisor via the COM option (BCM ULP) or by an M2C or M6C programmable contact. The M2C (two contacts) and M6C (six contacts) auxiliary contacts may be used to signal threshold overruns or status changes. They can be programmed using the keypad on the Micrologic P control unit or remotely using the COM option (BCM ULP). Communication option (COM) The communication option may be used to: b remotely read and set parameters for the protection functions b transmit all the calculated indicators and measurements b signal the causes of tripping and alarms b b maximeter reset. An event log and a maintenance register, stored in control-unit memory but not available locally, may be accessed in addition via the COM option (BCM ULP). Note: Micrologic P control units come with a non-transparent lead-seal cover as standard. A-14

8 Protection Long time (rms) Current setting (A) Ir Tripping between 1.05 and 1.20 x Ir Other ranges or disable by changing long-time rating plug Time setting tr (s) Time delay (s) Accuracy: 0 to -30 % 1.5 x Ir IDMTL (EIT) Accuracy: 0 to -20 % 6 x Ir 0.7 (1) Accuracy: 0 to -20 % 7.2 x Ir 0.7 (2) IDMTL setting Curve slope SIT VIT EIT HVFuse DT Thermal memory 20 minutes before and after tripping (1) 0 to -40 % - (2) 0 to -60 % Short time (rms) ANSI Code 51 Pick-up (A) Isd Time setting tsd (s) Settings I 2 t Off Time delay (ms) at 10 Ir tsd (max resettable time) (I 2 t Off or I 2 t On) tsd (max break time) Instantaneous ANSI Code 50 Pick-up (A) Ii off Time delay Max resettable time: 20 ms Max break time: 50 ms Earth fault ANSI Code 5 N Pick-up (A) Ig A B C D E F G H J In y 400 A A < In < 1250 A In u 1250 A Time setting tg (s) Settings I 2 t Off Time delay (ms) tg (max resettable time) at In or 1200 A (I 2 t Off or I 2 t On) tg (max break time) Residual earth leakage (Vigi) ANSI Code 51G Sensitivity (A) I n Accuracy: 0 to -20 % Time delay t (ms) Settings t (max resettable time) t (max break time) Alarms and other protection Current Threshold Delay Current unbalance Iunbalance 0.05 to 0.6 Iaverage 1 to 40 s Max. demand current : I1, I2, I3, IN, 0.2 In to In 15 to 1500 s Earth fault alarm It 10 to 100 % In 1 to 10 s Voltage ANSI Code Voltage unbalance Uunbalance 2 to 30 % x Uaverage 1 to 40 s Minimum voltage Umin 100 to Umax between phases 1.2 to 10 s Maximum voltage (4) U Umin to 1200 between phases 1.2 to 10 s Power Reverse power rp 5 to 500 kw 0.2 to 20 s Frequency Minimum frequency Fmin 45 to Fmax 1.2 to 5 s Maximum frequency F Fmin to 440 Hz 1.2 to 5 s Phase sequence Sequence (alarm) Ø Ø1/2/3 or Ø1/3/2 0.3 s Load shedding and reconnection Measured value Threshold Delay Current I 0.5 to 1 Ir per phases 20 % tr to 80 % tr Power P 200 kw to 10 MW 10 to 3600 s (3) In y 400 A 30 % 400 A < In < 1250 A 20 % In u 1250 A 10 % (4) For 690 V applications, a step-down transformer must be used if the voltage exceeds the nominal value of 690 V by more than 10 %. DB eps DB eps DB eps DB eps DB eps + Note: all current-based protection functions require no auxiliary source. Voltage-based protection functions are connected to AC power via a voltage measurement input built into the circuit breaker. A-15

9 Micrologic P power DB eps DB eps Measurements... The Micrologic P control unit calculates in real time all the electrical values (V, A, W, VAR, VA, Wh, VARh, VAh, Hz), power factors and cos factors. The Micrologic P control unit also calculates demand current and demand power over an adjustable time period. Each measurement is associated with a minimeter and a maximeter. In the event of tripping on a fault, the interrupted current is stored. The optional external power supply makes it possible to display the value with the circuit breaker open or not supplied. Default display. Display of a maximum current. Instantaneous values The value displayed on the screen is refreshed every second. Minimum and maximum values of measurements are stored in memory (minimeters and maximeters). Currents I rms A N I max rms A N Voltages U rms V V rms V 1N 2N 3N U average rms V (U12 + U23 + U31) / 3 U unbalance % P active, Q reactive, S apparent W, Var, VA Totals E active, E reactive, E apparent Wh, VARh, VAh Totals consumed - supplied Totals consumed Totals supplied DB eps Display of a voltage. DB eps Display of a power. Power factor PF Total Frequencies F Hz DB eps DB eps Demand metering programmed from 5 to 60 minutes. According to the contract signed with the power supplier, an indicator associated with a load shedding function makes it possible to avoid or minimise the costs of overrunning the subscribed power. Maximum demand values are systematically stored and time stamped (maximeter). Display of a frequency. Display of a demand power. Currents I demand A N I max demand A N Power P, Q, S demand W, Var, VA Totals P, Q, S max demand W, Var, VA Totals screen 2b.eps Only the current and power maximeters may be displayed on the screen. Time-stamping Time-stamping is activated as soon as time is set manually or by a supervisor. No external power supply module is required (max. drift of 1 hour per year). Reset An individual reset, via the keypad or remotely, acts on alarms, minimum and maximum data, peak values, the counters and the indicators. Additional measurements accessible with the COM option (BCM ULP) Some measured or calculated values are only accessible with the COM communication option: b I peak / 2, (I1 + I2 + I3)/3, I unbalance b load level in % Ir b total power factor. The maximeters and minimeters are available only via the COM option (BCM ULP) for use with a supervisor. Logiciel PME. Additional info Accuracy of measurements (including sensors): b voltage (V) 0.5 % b current (A) 1.5 % b b power (W) and energy (Wh) 2 %. A-16

10 DB eps Display of a tripping history. DB eps Display after tripping. Histories and maintenance indicators... displayed on the screen: b tripping history: v type of fault v date and time v values measured at the time of tripping (interrupted current, etc.) b alarm history: v type of alarm v date and time v values measured at the time of the alarm. through the communication network. b Event log history (only accessible through the communication network) v v counter resets v system faults v fallback position v thermal self-protection v loss of time v overrun of wear indicators v test-kit connections v etc. Note: all the events are time stampled: time-stamping is activated as soon as time is set manually or by a supervisor. No external power supply module is required (max. drift of 1 hour per year). Maintenance indicators with COM option (BCM ULP) A number of maintenance indicators may be called up on the screen to better plan for device maintenance: b contact wear b operation counter: v cumulative total v total since last reset. Additional maintenance indicators are also available through the COM network, and can be used as an aid in troubleshooting: b highest current measured b number of test-kit connections b number of trips in operating mode and in test mode. Additional technical characteristics Safety Measurement functions are independent of the protection functions. The high-accuracy measurement module operates independently of the protection module. Simplicity and multi-language Navigation from one display to another is intuitive. The six buttons on the keypad provide access to the menus and easy selection of values. When the setting cover is closed, the keypad may no longer be used to access the protection settings, but still provides access to the displays for measurements, histories, indicators, etc. Micrologic is also multi-language, including the following languages: English, Spanish, Portuguese, Russian, Chinese, French, German... Intelligent measurement Measurement-calculation mode: b energies are calculated on the basis of the instantaneous power values, in two manners: v the traditional mode where only positive (consumed) energies are considered v the signed mode where the positive (consumed) and negative (supplied) energies are considered separately b measurement functions implement the new zero blind time concept which consists in continuously measuring signals at a high sampling rate. The traditional blind window used to process samples no longer exists. This method ensures accurate energy calculations even for highly variable loads (welding machines, robots, etc.). Always powered All current-based protection functions require no auxiliary source. Voltage-based protection functions are connected to AC power via a voltage measurement input built into the circuit breaker. Stored information remain in the control-unit memory even when power is lost. A-17

11 Micrologic H harmonics DB eps Micrologic H control units include all the functions enhanced calculation and memory functions, the Micrologic H control unit offers in-depth analysis of power quality and detailed event diagnostics. It is intended for operation with a supervisor. b in-depth analysis of power quality including calculation of harmonics and the fundamentals b diagnostics aid and event analysis through waveform capture b enhanced alarm programming to analyse and track down a disturbance on the AC power system. Measurements... The Micrologic H control unit offers all the measurements carried out by Micrologic P, with in addition: b phase by phase measurements of: v power, energy v power factors b calculation of: v current and voltage total harmonic distortion (THD) v current, voltage and power fundamentals v current and voltage harmonics up to the 31st order. Instantaneous values displayed on the screen Currents I rms A N I max rms A N Voltages U rms V V rms V 1N 2N 3N U average rms V (U12 + U23 + U31) / 3 U unbalance % P active, Q reactive, S apparent W, Var, VA Totals E active, E reactive, E apparent Wh, VARh, VAh Totals consumed - supplied Totals consumed Totals supplied Power factor PF Total Frequencies F Hz Power-quality indicators Total fundamentals U I P Q S THD % U I U and Iharmonics Amplitude Harmonics 3, 5, 7, 9, 11 and 13, monitored by electrical utilities, are displayed on the screen. Demand measurements or sliding time window that may be set from 5 to 60 minutes. Currents I demand A N I max demand A N Power P, Q, S demand W, Var, VA Totals P, Q, S max demand W, Var, VA Totals Only the current maximeters may be displayed on the screen. Histories and maintenance indicators These functions are identical to those of the Micrologic P. Note: Micrologic H control units come with a non-transparent lead-seal cover as standard. A-18